a = 5
b = 2

print("a+b=", a+b)
print("a-b=", a-b)
print("b-a=",b-a)
print("a*b=", a*b)

print("a/b=", a/b)
print("b/a=", b/a)

print("a//b=", a//b) # 求商
print("a%b=", a%b) # 求余

